« previous next »

Author Question: Among the following radioactive parent isotopes, which has the shortest half-life? A) uranium-238 ... (Read 165 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
on: Jul 14, 2018
Among the following radioactive parent isotopes, which has the shortest half-life?
 
  A) uranium-238
  B) potassium-40
  C) rubidium-87
  D) carbon-14

Question 2

The longest subdivision of the geologic time scale is the ________.
 
  A) epoch
  B) eon
  C) era
  D) period


Swizqar

  • Sr. Member
  • ****
  • Posts: 357
Reply #1 on: Jul 14, 2018
Answer to Question 1

Answer: D

Answer to Question 2

Answer: B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

The complete life cycle of a trematode. The complete life cycle of a trematode.
Life-history cube, a classification of fish, mammals, and altricial birds based on three dimensionle Life-history cube, a classification of fish, mammals, and altricial birds based on three dimensionle
Normal changes in the breast during a woman's life span Normal changes in the breast during a woman's life span
Typical life cycle of the tick family. Typical life cycle of the tick family.
Simplified view of retrovirus life cycle Simplified view of retrovirus life cycle
Remaining health-adjusted life expectancy (years) at age 25 Remaining health-adjusted life expectancy (years) at age 25
Video: Introduction to Eating Disorders

For a complete list of videos, visit our video library